printf保留2位小数

要在printf中保留2位小数，可以使用格式化打印的方式。你可以使用%.2f来指定输出的浮点数保留2位小数。例如，如果你想要打印一个变量a并保留2位小数，你可以使用printf("变量a的值为：%.2f", a)。这将会以2位小数的形式输出变量a的值。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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